Regulating system for dynamo-electric machines



0. F. CONKLIN. v HEGULATING SYSTEM FOR DYNAMO memo MACHINES.

APPUCATION FILED APR.28 l9]?- 1,400,501 Patented Dec. 13, 1921.

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APPLICATION FILED APR-28,1917.

attoz'nql o r 0. F. CONKLIN. REGULATING SYSTEM FOR DYNAMO ELECTRIC MACHINES.

APPucATlori FILED APR.2.8'.1917.

Patented Dec. 13, 1921.

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28 I 27 l r I I I '-;--fou rso'gsmns PATENT,- OFF! cum 1. column. or nnrnorr, MICHIGAN, nssrenoa 'ro REMY ELncrRIc'con I PANY OF ANDERSON, INDIANA, A. CORPORATION OF INDIANA.

I aneumrme srsrm For. nm'emo-nmcrmc YMIACHDVES.

I To all 'wlhom it-may cohcem:

Be it known that I,'OLrvER F. CoNKnIN, a

citizen of the United States, and residing at Detroit, in the county of Wayne and State ofMichigan, have invented certain new and iiflliSeful Improvements in Regulating S stems fer Dynamo-Electric Machines, of WlllCh the following is a'full, clear, and exact description." g-This'invention relates to improvements in r'eg'ulatin devices for d namo electric ma-" chines. n 'my'Patent 0. 1,352,051, issued Sept. 7 1920, I have shown a thermostatlc device which cooperates with a-third brush.

to effect the regulation. .In the presentapplication a similar thermostat is used in combination with forms of regulating devices other than third brush.

Inthe drawing Figure 1 shows a dynamo electric machine .of the shunt wound type having voltage current regulation in combination with a thereofl thermostatic'device for modifying the action Fig. 2' shows a shunt wound machine is regulated by a current regulator which iscombined with a thermostatic device.

. Fig. 3 shows a dynamo electric machine having a bucking field re fiedby a thermostaticdevi ce.

Fig. 4 shows a modification of'the con struction shown in Fig. 3 in which the shunt field is regulated by a thermostatic device.

Figs. 5. and 6 show other modified forms of the invention. y

. In more detail in the drawings the dynamo electric machine 10 has pole pieces 12 with devices or current consuming devices are not shown, but reference may be had to my patent for an illustrating of'these devices. In the construction shown in Fig. l, the reverse current 'relay is made a part of the re lating device. he generator in each figure is provided with the usualarmature connected with comm'odification in which a I lation: and in which the action of the bucking field is modiswimmer Iietters Patent. Patented Dec. 13, 192i.

mutor with which brushes 27 and 28cc operate. Preferably placed in 'eat receivmg 're'lation'with'the commutator there is a thermostatic regulatin device. This device comprises afixed mem er 40'and a bi-metallic member 43. 43 carriesa contact 45' and i0 carries an adjustable contact 46. pon a-certam heat being attained the bi-metallic memberj43 opens the contacts 45 and 46. As

this thermostatic device was fully described in myPatent No. 1,352,051, no further description need be 'ven here. Reference may reference'characters will be foundto correspond-to similar parts'of the thermostatic device. j Combined darreM-ooltage regulator, reverse current cut-out and modifying thermostat. Y

of thev apparatuses shown in Fig. 1 'will now be described. Broadly speaking this p .be made to; the a oresaid patent and similar The arrangementand mode of operation apparatus comprises a combined currentvoltage regulator having combined therewith a reverse current cut-out, together with a thermostatic device, which when it operates is adapted to modify the action of the voltage current regulator. In the ensuing description similar reference characters will be given, as far'as possible, to corresponding parts in all of the figures.

.As the armature of the machine starts t rotate, currentwill be generated and will flow'from'commutator 20, through brush 28,

wire 51, bi-metallic thermostatic element 43,

"contacts 45, 46, member 40, wire 69, regulator current coil 70, reverse current relay series'coil 75, wire 76, armature 66 contacts 67 (now closed), wire68, through shunt'field coil 13 to ground and back through brush 27 to the commutator.

Concurrently therewith current will flow from armature 66, through voltage-coil 78 to ground and back through brush 27 to the commutator 20.. Voltage-coil 78 and current coil 75 will together draw down the ar-- mature 66 and close contacts .7 7 ,thereby con-- necting the dynamo electric machine with the battery in the manner well known in reverse current cut-out devices. The purpose oft-he series coil 75 is to open the contacts 77, should the battery current flow back from battery B to the generator. As this structure is well known, no further description is believed to be necessary. -As the current in coils 70 builds up the core 73 will be magnetized. This will draw down armature-66 and eventually open the contacts 67. and this opening of .sert the res1stance74 1n series with the field down theoutput of. t Wlll be understood that ar the contacts will incoils 13,-thereb the machine. mature 66 will'vibrate and rapidly cutting open and the resistance 74 with respect to the field '13 of the machine. This will maintain the current at a substantially constant value as type. The core 7 3 which is within voltage coil 78, is also energized and the magnetic flux from'this core affects the armature 66 tending to cause it to olpen the contacts 67. It will therefore be seen that the voltage coil supplements the current coil 70 in regulating the machine, and thereby a regulation is obtained. wh'ch'is due to the combined action of both charging current and battery. voltage. As this-structure iswell known no further description need be given.

When the thermostat 43, which is in heat receiving relation with the commutator heats up, the contacts 45 and 46 will be opened. Current can then no longer flow in wire 69, but all the current from brush 28 will flow through wire 62 and therefrom through coil 71, coil 7 O, and then through the circuit previously traced. By'reason of the fact that there are an additional number of turns of wire around the core 73, namely, coils 71 and 70, there will be a higher magnetic flux in core 73. Consequently the armature 66 will remain open for a greater period ofv time and the output of current from the machine will be decidedly reduced. It will be.

understood that the opening of the thermostat 43 does not affect the regulation which is dependent upon the voltage coil 78, as a I constant number of turns are always present in this voltage coil. A modified form of the invention is shown in Fig. '5, in which the current coil 70, 71 is not controlled by a thermostatic switch, but a resistance 48 is connected in series with the voltage winding 78. The thermostatic element 43*, which is constructed to bend when heated toward contact 46, will close contacts 45, 46 at a predetermined temperature. The resistance 48 will become short circuited, and the ampere-turns of voltage coil 78 will be increased. In this manner the action of the regulator will be modified in accordance with temperature changes to regulate at lower voltage'as the temperature of the thermostat element 43 increases.

A further modified form of the invention is connected in parallel with current coil70,

'71, by a thermostatic switch. Switch con-.

tacts 45 and 46 are normally in engagement.

vThe element 43 carrying contacts 45 is constructed so as to bend away from contact 46 with increasing temperature. Hence, at a predetermined temperature, contacts 45 and Y46 will be" separated and resistance 90 will no longer be effective. The. ampere turns of coils 70,71 will therefore be increased.

this manner'theaction of the regulator will changes to give a reduced current output as r stat.

be modifiedfinaccordance with temperature close contacts 67, thereby cutting in-and out y p 1 *the temperature ofelement 43iis increased. Combined regulator with-modifying- I is customary in current regulators of this' when the armature starts to rotate current will be generated and will fiow from brush 28, wire 62, wire 65, armature 66, contact 67 .(being closed),

coils 13 to ground and through the ground back tothe commutator 20 through brush The thermostat member being-closed, cur-- rent will also flow from brush 28 through 7 wire 68, through field d wire 62, wire 51, bi-metallic member 43, cona taots 45 and '46," member 40, wire 69,current i coil 70, wire 72, to the reverse current relay R, ammeter A'and battery B and back to the opposite side of the machine through the ground and brush 27. When the current in coil 70 reaches a predetermined value the flux set up in the to draw armature 66 downward and open contacts 67. The output of the machine will then be reduced by reason of the fact that a resistance 74 will be cut into series with the core 73 will be sufiicient shunt field coils 13'. It will be understood i that the armature 66 will vibrate and rap-' idly open and closecontacts 67, thereby cutting in' and out the resistance 74 with re-- spect to the field 13 of the machine. lhjs' 1 will maintain the current at a'substantiallyt constant value as 'is customary in current regulators of this type;

thermostatic device which is'preferably in 1 1. However, when the machine heats up the By reason of the fact that the bi-metallic thermostatic member 43 has bowed under the influence of heat, contacts 45 and 46 will open. Therefore, current can no longer flow in wire 69. Charging current will, however, flow from brush 28 through wire 52, through current coils 71 and 7 0 around magnetic core 73. It will therefore be seen that the current coil which effects the actuation of armature 66has inserted in it an additional number of turns, namely, those coils indicated at 71. This causes a greater magnetic flux to be set up in the core 73, and the armature 66 will remain open for a greater pcriod of time, thereby keeping the resistance 74 in the field for a greater period of time and thereby cutting down the output of the machine still further. 'This system of regulation will give a substantiallylco'nstant curv rent output at high engine speed for a certain degree of temperature, and when the thermostatic element heats up this output,

will be correspondin 1y cut dow'h. This systern is particularly a antageous in charging batteries where conditions to be met in the ticularly in charging batteries usedon auto winter. and summergare different, andparmobiles where the demand for current from the battery may be greater in winter than 'in'summer, and the battery charge rate may 'befmaintained at a relatively high value for v 'a longer'period in winter than in'summer.

When the outside temperature .is relatively -Jlow, the thermostat element 43 will remain in closedposition for a time longer than when the outside temperature is relatively higher.

T/ihnostatz'cally controlled bucking field.

' In the construction shown in Figs. 3 and 4, Temploy-a shuntfield 13, as heretofore, and also a bucking field 13. The thermostat is so associatedthat it isadapted to control the" action-of the bucking field.

Referring now to Fig. 3, when the armature starts to rotate'current will flow from brush 28, wire 81, field coils-13, to ground and back through 27 to the commutator.

Current also flows from28 through. wire 52, member 43, contacts 45, 46, member 40, wire 83, bucking series coils 13, wire 72, reverse current relay R to battery B. The coils 13 effect the usual bucking field regulation of output until the machine heats up and the thermostat opens. Then the number of turns in the bucking field is modified to further reduce the output of the machine.

fdre, also from brush 28 through wire 52, wire 82' (contacts 45, 46 bein open) through sup lementary bucking coi s 13", through 'buc ing coils 13,wire 72, reverse current .relayR and battery B. The coils 13* being -When the thermostat is open current will flow inthe following circuit: From brush 28 through the shunt field coils 1 3, as heretoin' series with 13, are adapted'to cause a further reduction in current. output.

Bucking field "with I thermostatically con.

trolled shunt field.

In the construction shown in Fig. 4 I ins sert resistance in the shuntfield coil cir- 'cuit when the thermostat opens. When the vice in v erated'means for varying relay R, ammeter A battery B. This will effect the usual bucking series regulation.

When the thermostat opens contacts and 46 will open, establishing the following cir- 48in-the shunt field circuit cuts down the shunt field excitation and thereby further reduces the output of the machine. 1" I It will be understood that my invention 'is susceptible of various modifications as will occur to those skilled in the art. What I claim as m invention will be more par ticularly de nedin the appended claims. I claim:

1. In a regulatingsystein, the combination with a work. circuit and a dynamo electric machine, having field coils; of a regulating device for the output thereof comprising means for varying the strength of the field in accordance with the current output of the machine; and a separate thermostatic device in heat receiving relation with the machine and adapted to cooperate with the aforesaid means to reduce the current output upon the attainment of a predetermined temperature in the machine.

, 2. In a regulating system, the combination with a work circuit and a dynamo electric machine having field coils;-of a regulating device for the current output thereof, said device comprising a vibrating armature adapted to vary the field strength in accordance with current output to thereby limit said output; and a separate thermostatic deeat receiving relation with the machine and cooperating with the aforesaid current regulatin device to modify the action of the vibrating armature and thereby to reduce the current output upon the attainment of a' predetermined temperature.

3. In a re ulating system, the combination with a ynamo electric machine and a regulating device having a series current coil, a core therein, an armature operated thereby, a regulating resistance, said resistance being adapted to be cut into or out of circuit in accordance with the movement of the armature under the influence of the aforesaid magnetizable core, of thermostatically opthe number of turns of the aforesaid series coil when said thermostatic means attains a predetermined i l a I f whereby to vary the operationxoi szidre guglating device.

5. In a regulating system, the combination with a dynamo electrlc machine and a regu- 5 lating device including a controlling mag-' net winding; of a thermostatic switch normally shortcircuiting a, portion o'fsaid magriet ,ivinding, but (Spamming; at wpredetermined temperature to open said short circuit whereby to vary the operation of said regu- 10 lating devlce. Y

signature. I

, QI VER F, CQN-KLINJ In testimonywhereof I hereunto aflix o 

